Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences , Qingdao, 266101, China.
Beijing Key Lab Lignocellulos Chemistry, Beijing Forestry University , Beijing 100083, P.R. China.
ACS Nano. 2017 Jun 27;11(6):5717-5725. doi: 10.1021/acsnano.7b01221. Epub 2017 Jun 12.
In this article, a simple strategy was employed to fabricate bioinspired hybrid composite with carboxymethyl cellulose (CMC), graphene oxide, and reduced graphene oxide/alumina (rGO/Al) by a facile solution casting method. The tensile strength and toughness of rGO/Al-CMC-GO can reach 586.6 ± 12 MPa, 12.1 ± 0.44 MJm, respectively, due to the interface strengthening of alumina, which is 1.43 and 12 times higher than steel and about 4.3 and 6.7 times that of nature nacre. The artificial nacre hybrid composite is conductive due to the introduction of rGO/Al on the surface. Interestingly this structure can also be coated on the surface of cotton thread to give the thread good mechanical performance and conductivity. Additionally, the artificial nacre has better fire shielding and gas barrier properties. The oxygen permeability (OP) for 1% rGO/Al-CMC decreased from 0.0265 to 0.003 mLμm m day kpa, the water vapor permeability (WVP) decreased from 0.363 to 0.205 gmmm day kpa when the concentration increased from 1% rGO/Al to 6% rGO/Al. It is believed this work provided a simple and feasible strategy to fabricate ultrastrong and ultratough graphene-based artificial nacre multifunctional materials.
在本文中，采用了一种简单的策略，通过简便的溶液浇铸法制备了具有羧甲基纤维素（CMC）、氧化石墨烯和还原氧化石墨烯/氧化铝（rGO/Al）的仿生混合复合材料。由于氧化铝的界面强化，rGO/Al-CMC-GO 的拉伸强度和韧性分别达到 586.6±12MPa 和 12.1±0.44MJm-3，分别是钢的 1.43 倍和 12 倍，约为天然珍珠母的 4.3 倍和 6.7 倍。由于表面引入了 rGO/Al，人工珍珠母混合复合材料是导电的。有趣的是，这种结构也可以涂覆在棉线表面，使线具有良好的机械性能和导电性。此外，人工珍珠母具有更好的防火和气体阻隔性能。当 rGO/Al 浓度从 1%增加到 6%时，0.0265 降至 0.003mLμm m day kpa，水蒸气透过率（WVP）从 0.363 降至 0.205 gmmm day kpa。可以相信，这项工作为制备超强超韧的基于石墨烯的人工珍珠母多功能材料提供了一种简单可行的策略。
